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PBL38813 数据表(PDF) 5 Page - Ericsson |
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PBL38813 数据表(HTML) 5 Page - Ericsson |
5 / 16 page 5 PBL 388 13 Figure 6. Pin configuration. Pin Descriptions Refer to figure 6. (24 pin DIP and 24 pin SO package) 24 pin SO Pin Symbol Description 1 -Txin Transmitter channel negative input. Input impedance 3.16 kohm. 2 +Txin Transmitter channel positive input. Input impedance 100 kohm. 3 F2out Output of the second amplifier in the transmitter channel. 4 Txout Transmitter channel output. Min. ac load impedance 10 kohm. 5 TxDetin Input of the transmitter channel signal detector. Input impedance 13 kohm. 6 TxDetout Output of the transmitter channel signal detector. Goes nagative referred to the internal ref. voltage of appx. 2V when a transmitter signal is present. 7 NDet Background noise detector output. Goes positive referred to the internal ref. voltage of app. 2V when a background noise signal is present 8 CMP Comparator input. External resistance to this point should not be less than 50 kohm. Summing point to the different detector outputs. 9 RxDetout Output of the receiver channel signal detector. Goes positive referred to the internal ref. voltage of appx. 2V when a receiver signal is present 10 RxDetin Input of the receiver channel signal detector. Input impedance 13 kohm. Pin Symbol Description 11 Rxout Receiver channel output. Min. ac load impedance 10 kohm. 12 F5out Output of the second amplifier in the receiver channel. 13 +Rxin Receiver channel positive input. Input impedance 140 kohm. 14 -Rxin Receiver channel negative input. Input impedance 20 kohm. 15 V+ Supply of the speech switching circuitry. A shunt regulator, voltage apprx. 3.3V at 1.0mA. 16 GND System ground (- line ). 17 -C 18 LS Loudspeaker power amplifier output. 19 VOL Volume control input. By sourcing a current of appx. 0-40 µA into this pin the gain can be reduced. 20 +L Positive supply for the loudspeaker amplifier. 21 RDC Power ampl. supply options. Pins - C, 22 RE RDC and RE are explained in the text. 23 LSPin Loudspeaker amplifier signal input. Input impedance 30 kohm. 24 CTR Control input for gain dynamics (25 or 50dB), mute and disable. 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 23 24 -Txin +Txin F2out Txout TxDetin TxDetout N Det CMP RxDetout RxDetin Rxout F5out +Rxin -Rxin V+ -C LSP +L RDC RE VOL LSPin GND CTR 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 23 24 -Txin +Txin F2out Txout TxDetin TxDetout N Det CMP RxDetout RxDetin Rxout F5out +Rxin -Rxin V+ -C LSP +L RDC RE VOL LSP in GND CTR 24 pin DIP |
类似零件编号 - PBL38813 |
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类似说明 - PBL38813 |
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